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DS90LV001: Power consumption

Johann Johann
Prodigy 100 points
Part Number: DS90LV001
Other Parts Discussed in Thread: DS90LV804, SN65LVDS22

Hi guys,

is the power supply current stated in the datasheet for a high frequency signal or also applicable to ~ 50 MHz?
Are there are methods to reduce the for the DS90LV001.
We need a lot of LVDS channels and at 40 mA each we would need quite a beefy power supply.

Greetings
Johann

  • 0
    TI__Genius 10250 points
    Hello Johann,

    The current consumption for DS90LV001 doesn’t really change much with frequency. Please see Fig. 17 in the datasheet (ICC vs. Freq.). Unfortunately, I can’t think of a way to reduce the current consumption of DS90LV001. If you have multiple channels, you may want to consider using DS90LV804, which is a 4-channel LVDS buffer with less current per channel.

    Regards,
    Yaser
  • 0 in reply to Yaser Ibrahim
    Prodigy 100 points

    Thank you very much,
    I still need to put together a test setup to look into our options. We want to use the LVDS buffers in a 16x multidrop bus and will need 16x12=192 channels in total.
    The DS90LV804 needs less current per channel, but unfortunately it has integrated input termination.
    Is there a comparable chip without integrated 100 ohm resistors or something with even lower power consumption?

    Sincerely
    Johann

  • 0 in reply to Johann Johann
    TI__Genius 10250 points
    Hello,

    Unfortunately, most of the quad LVDS buffers have integrated terminations and are not suitable for multi-drop arrangement. However, there is another device you may want to consider which is SN65LVDS22. It is dual-channel with lower current consumption and no terminations. It has additional mux functionality that is irrelevant to you, but you can just select S1=1, S0=0 to make it a simple buffer function.

    Regards,
    Yaser